This system provides nutrients for cells in all tissues and organ systems. A nervous
B. muscular
C. Digestive
D. respiratory​

Parasitism could be considered a form of which of these types of relationships? -mutualism -commensalism -predator-prey -mimicry

Dna. we have heard that we are a product of our dna. but where is it? how do we "get" our dna? it is passed to us, from our parents, but in what form? several vocabulary words associated with inheritance are used interchangeably and sometimes, incorrectly. let's see if you can clear this up for someone just learning about inheritance and cell structure.

Archaebacteria use for movement. celia flagella pili cell walls